Level Limit Switch nivotester FTL 325 N - 德国Endress+Hauser(E+H ...

Nivotester FTL 325 NFault signalGalvanic isolationRelay de-energized, fault is indicated by red LEDsAll input and output channels and relay contacts are galvanically isolated from eachother.Power supplyElectrical connectionTerminal blocksThe removable terminal blocks are separated into intrinsically safe connections (at thetop of the unit) and non-intrinsically safe connections (at the bottom of the unit).Terminal blocks are different colors to easily distinguish between the two types. Blueblocks are for the intrinsically safe section and grey for the non-intrinsically safeblocks. This ensures safety when wiring unit.Connecting the measuring sensor(the upper, blue terminal blocks)The two-wire connecting line between the Nivotester and the Liquiphant, Nivopuls orSoliphant measuring sensor can either be a commercially available installation cableor wires in a multi-wire cable for instrumentation purposes. Line resistance may be amaximum of 25 Ω per wire. If strong eletromagnetic interference is expected, e.g.from machines or radio devices, a shielded cable must be used. Only connect theshield to the ground connection, and not to the Nivotester.Using the measuring system in explosion hazardous areasPlease observe all local codes and regulations on explosion protectionconcerning the type and installation of intrinsically safe signal wiring. Pleaserefer to the Safety Instruction XA 134F for maximum permissible values ofcapacitance and inductance.Connecting signal and control devices(the lower, grey terminal blocks)The relay function is dependent on the level and fail-safe circuit. If an instrument isconnected at high inductance (e.g. contactor, solenoid valve, etc.), a spark suppressormust be installed to protect the relay contact.Connecting the supply voltage(the lower, grey terminal blocks)For voltage variations, refer to the Ordering Information section. A fuse is built intothe power supply current circuit. This eliminates the need to connect a fine-wire fusein series. The Nivotester is equipped with reverse polarity protection.Power supplyPower consumptionSetting time/lengthAC version:• 85 to 253 VAC, 50/60 HzDC version:• 20 to 60 VDC• DC supply, maximum 60 mA (one channel unit)• DC supply, maximum 115 mA (three channel unit)• Permissible residual ripple witin tolerance: V pp= maximum 2 VAC version:• 1.75 W maximum (one channel unit)• 2.25 W maximum (three channel unit)DC version:• 1.2 W maximum, at V min20 V (one channel unit)• 2.25 W maximum, at V min20 V (threee channel unit)Final switching status after switching on the power supply, approximately 10 to 20seconds, depending on the connected measuringEndress+Hauser7